23
Installation instructions
ENGLISH
3.9 - FILLING AND EMPTYING
THE SYSTEM
When all system connections have been com-
pleted, the circuit can be lled.
To ll the system, you must provide a lling
valve on the system's return.
EXAMPLE OF THE SYSTEM'S LOADING UNIT
LOADING
UNIT
To ll the system, you must provide a lling valve
on the heating circuit, or use the optional acces-
sories.
The boiler is equipped with its own draining valve,
14. This valve can never be used to drain the sys-
tem since all the dirt in the system can accumulate
in the boiler and jeopardise its proper operation.
Therefore, before using the drain valve, make sure
the system's check valve, which is situated under
the pump, has been closed.
The system must be equipped with its own
drain valve, which is to be suitably sized ac-
cording the system's capacity.
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